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SE0303615D0 - Method and device for Fault Detection in Transformers - Google Patents

Method and device for Fault Detection in Transformers

Info

Publication number
SE0303615D0
SE0303615D0 SE0303615A SE0303615A SE0303615D0 SE 0303615 D0 SE0303615 D0 SE 0303615D0 SE 0303615 A SE0303615 A SE 0303615A SE 0303615 A SE0303615 A SE 0303615A SE 0303615 D0 SE0303615 D0 SE 0303615D0
Authority
SE
Sweden
Prior art keywords
protected
negative sequence
currents
zone
individual
Prior art date
Application number
SE0303615A
Other languages
Swedish (sv)
Inventor
Zoran Gajic
Ivo Brncic
Original Assignee
Abb Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abb Ab filed Critical Abb Ab
Priority to SE0303615A priority Critical patent/SE0303615D0/en
Publication of SE0303615D0 publication Critical patent/SE0303615D0/en
Priority to US10/585,123 priority patent/US7812615B2/en
Priority to PCT/SE2004/001997 priority patent/WO2005064759A1/en
Priority to EP04809170.6A priority patent/EP1706928B1/en
Priority to CA2549838A priority patent/CA2549838C/en
Priority to CN200480039365XA priority patent/CN1902798B/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
    • H02H7/045—Differential protection of transformers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/62—Testing of transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/28—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
    • H02H3/286—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus involving comparison of similar homopolar quantities

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Transformers (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

A method for fault detection in a power transformer/autotransformer and/or interconnected power lines, which are within the zone protected by the differential protection, and particularly suitable for detecting turn-to-turn faults in power transformer/autotransformer windings. All individual instantaneous phase currents of the protected object are measured, individual phase currents as fundamental frequency phasors are calculated, the contributions of the individual protected object sides negative sequence currents to the total negative sequence differential current are calculated by compensating for the phase shift of an eventual power transformer within the protected zone, the relative positions of the compensated individual sides negative sequence currents in the complex plane are compared, in order to determine whether the source of the negative sequence currents, i.e. the fault position, is within the protected zone or outside of the protected zone, delimited with current transformer locations, the protected object is disconnected if determined that the source of the negative sequence currents is within the protected zone.
SE0303615A 2003-12-31 2003-12-31 Method and device for Fault Detection in Transformers SE0303615D0 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE0303615A SE0303615D0 (en) 2003-12-31 2003-12-31 Method and device for Fault Detection in Transformers
US10/585,123 US7812615B2 (en) 2003-12-31 2004-12-22 Method and device for fault detection in transformers or power lines
PCT/SE2004/001997 WO2005064759A1 (en) 2003-12-31 2004-12-22 Method and device fo rfault detection in transformers or power lines
EP04809170.6A EP1706928B1 (en) 2003-12-31 2004-12-22 Method and device for fault detection in transformers or power lines
CA2549838A CA2549838C (en) 2003-12-31 2004-12-22 Method and device for fault detection in transformers or power lines
CN200480039365XA CN1902798B (en) 2003-12-31 2004-12-22 Method and device for fault detection in transformers or power lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0303615A SE0303615D0 (en) 2003-12-31 2003-12-31 Method and device for Fault Detection in Transformers

Publications (1)

Publication Number Publication Date
SE0303615D0 true SE0303615D0 (en) 2003-12-31

Family

ID=30768922

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0303615A SE0303615D0 (en) 2003-12-31 2003-12-31 Method and device for Fault Detection in Transformers

Country Status (6)

Country Link
US (1) US7812615B2 (en)
EP (1) EP1706928B1 (en)
CN (1) CN1902798B (en)
CA (1) CA2549838C (en)
SE (1) SE0303615D0 (en)
WO (1) WO2005064759A1 (en)

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Also Published As

Publication number Publication date
US20080130179A1 (en) 2008-06-05
CN1902798B (en) 2011-04-20
CN1902798A (en) 2007-01-24
WO2005064759A1 (en) 2005-07-14
EP1706928A1 (en) 2006-10-04
EP1706928B1 (en) 2015-04-01
CA2549838A1 (en) 2005-07-14
US7812615B2 (en) 2010-10-12
CA2549838C (en) 2012-03-06

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